Signature of the microcavity exciton-polariton relaxation mechanism in the polarization of emitted light

被引：21
|
作者：
Roumpos, Georgios [1 ]
Lai, Chih-Wei [1 ,2 ]
Liew, T. C. H. [3 ]
Rubo, Yuri G. [4 ,5 ]
Kavokin, A. V. [4 ,6 ]
Yamamoto, Yoshihisa [1 ,2 ]
机构：
[1] Stanford Univ, Edward L Ginzton Lab, Stanford, CA 94305 USA
[2] Res Org Informat & Syst, Natl Inst Informat, Chiyoda Ku, Tokyo 1018430, Japan
[3] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore
[4] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
[5] Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, Mexico
[6] Univ Roma Tor Vergata, Marie Curie Chair Excellence Polariton Devices, I-00133 Rome, Italy
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 19期
关键词：
aluminium compounds; Boltzmann equation; excitons; gallium arsenide; gallium compounds; ground states; III-V semiconductors; light polarisation; microcavities; phonons; polaritons; semiconductor quantum wells; spin polarised transport; BOSE-EINSTEIN CONDENSATION; SEMICONDUCTOR MICROCAVITIES; STIMULATED SCATTERING; DYNAMICS;
D O I：
10.1103/PhysRevB.79.195310
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have performed real and momentum space spin-dependent spectroscopies of spontaneously formed exciton polariton condensates for a nonresonant pumping scheme. Under a linearly polarized pump, our results can be understood in terms of spin-dependent Boltzmann equations in a two-state model. This suggests that relaxation into the ground state occurs after multiple phonon-scattering events and only one polariton-polariton scattering. For the circular pumping case, in which only excitons of one spin are injected, a bottleneck effect is observed, implying inefficient relaxation.
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页数：7
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